Collatz in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Maze Medal Tally Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Maze Medal Tally Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 599th sisyphus-ppcg 🇦🇺 871 66 6 May 2022 599th Natanaelel 🇸🇪 871 66 15 Jun 2022 599th Z-snails 871 66 27 Feb 2023 599th Jeremy-Stafford 871 66 27 Feb 2023 599th alomiF 871 66 1 Sep 2023 599th btnlq 871 66 17 Oct 2023 599th sean-niemann 🇺🇸 871 66 9 Jan 2025 608th dokutan 870 62 3 days ago 609th johnnythedoggie 870 72 13 May 2022 610th MeWhenI 🇻🇦 870 207 10 days ago 611th inventshah 869 97 6 May 2022 611th roupiq 🇵🇱 869 97 22 Nov 2023 613th GolfingSuccess 🇬🇷 868 71 5 May 2022 613th emplv 🇱🇻 868 71 5 May 2022 613th JayXon 🇺🇸 868 71 7 May 2022 613th m-tkach 🇺🇦 868 71 15 May 2022 613th nwellnhof 🇩🇪 868 71 5 Jun 2022 613th Irratix 🇳🇱 868 71 13 Jun 2022 613th michael-pruglo 🇺🇦 868 71 13 Jul 2022 613th stefangimmillaro 868 71 2 Jun 2023 613th kkoenig 868 71 21 Dec 2023 613th JohandeRuiter 🇳🇱 868 71 14 Sep 2024 613th masinag 🇮🇹 868 71 6 Oct 2024 613th KasperKivimaeki 🇫🇮 868 71 27 Mar 2025 625th janbehrens 🇩🇪 868 90 21 Apr 2023 625th Yewzir 🇧🇪 868 90 22 Apr 2023 625th DialFrost 🇸🇬 868 90 6 Nov 2023 625th Ripick 868 90 27 Nov 2024 629th AlephSquirrel 867 80 20 Apr 2023 629th ashtraypettingzoo 🇺🇸 867 80 1 Apr 2024 631st nwellnhof 🇩🇪 866 53 4 May 2022 631st GrayJoKing 🇦🇺 866 53 6 May 2022 633rd DialFrost 🇸🇬 866 86 24 Oct 2024 633rd stefangimmillaro 866 86 14 Jan 2025 635th dieggsy 866 97 8 Oct 2024 635th edsrzf 🇳🇿 866 97 8 Dec 2024 637th jacobly0 🇺🇸 866 153 26 Sep 2023 638th lukehewittvandy 865 135 18 Jul 2022 638th OriEy 865 135 27 Apr 2023 638th Maximizer02 865 135 8 Jun 2024 638th 0dyse 865 135 7 days ago 642nd Andriamanitra 🇫🇮 863 54 21 Jul 2022 642nd jared-hughes 863 54 12 Sep 2022 642nd OhmNomNom 863 54 7 Oct 2022 642nd olleicua 🇺🇸 863 54 21 Jan 2024 642nd LostSyntax21 🇬🇧 863 54 12 Mar 2025 647th DialFrost 🇸🇬 862 64 10 Jul 2024 648th MeWhenI 🇻🇦 862 71 13 Dec 2022 649th deadp4nda 🇩🇪 862 90 26 Apr 2024 650th mtirado1 861 75 13 Aug 2022 651st Steffan153 🇫🇮 861 82 23 Feb 2023 652nd MeWhenI 🇻🇦 861 85 27 Jun 2022 652nd Shanethegamer 🇺🇸 861 85 15 May 2023 654th Grrisly 861 114 25 Mar 2024 655th TylerBloom 860 96 22 Mar 2024 656th shellbertt 🇨🇦 860 98 9 May 2022 656th iakolzin 860 98 26 May 2022 656th Betuaredead 860 98 5 Jan 2023 656th oceko 860 98 19 Feb 2024 656th dokutan 860 98 17 Mar 2024 661st MeWhenI 🇻🇦 860 154 10 Oct 2023 662nd yzhs 🇩🇪 859 65 16 Jun 2022 662nd rollershutter 859 65 9 Sep 2022 662nd bac0id 859 65 26 Sep 2023 665th crizin 🇰🇷 859 136 9 Sep 2023 666th GrayJoKing 🇦🇺 858 56 15 Jan 2024 666th AlephSquirrel 858 56 21 Jan 2024 668th Setvizan 858 62 12 Jan 2023 668th GreenBeansAgainstVeganism 858 62 13 Jan 2023 668th arctouch-cristiannevianna 858 62 3 Apr 2023 668th Corxldyphik 858 62 11 Apr 2023 668th Blockyheadman 858 62 1 Nov 2023 668th ollyspooner 858 62 22 Nov 2023 668th itserasmus 858 62 25 Jan 2024 668th Jacob385 858 62 13 Mar 2024 Prev 601–675 of 2,982 Next